JPS61184148A - Wiper equipment for automobile - Google Patents

Abstract

PURPOSE:To make an automobile wiper equipment more compact by utilizing spring force that pushes the tip part of a retainer connected to the free end part of an arm head in such a way as to allow its free rotation to the side of a wind shield glass and thereby linking a guide roller and a cam member for the maintenance of the erection of the retainer. CONSTITUTION:At the upper side of the free end part, namely, the bracket part 2 of an arm head 1 to which a retainer 3 is connected through a pin 4 in such a way as to allow its upward or downward rotation freely, a stopper part 11 is formed while at the front side part of the bracket part 2 a pair of guide rollers 13 are installed so that they protrude. The bracket 12 is formed in the shape of a flat gate, with its center supported by connecting the rear end part of the arm part 12a on both sides to the long hole 14 of the bracket part 2 through a pin 15. The bracket is designed to guide sliding through the engagement of the bracket part 2 with a rail part 16 and a guide part 17. And when the retainer 3 is rotated upward, the guide roller 13 is fitted into the concave part 20c of a cam member 19 fixed to the retainer 3, with this state being maintained on the strength of a spring 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wiper device for an automobile, and more particularly to a retainer upright holding mechanism for lifting a retainer together with wiper blades from a windshield surface and holding the retainer upright.

BACKGROUND OF THE INVENTION Fig. 6 shows a wiper device which is commonly used in general.l is a wiper pivot w, p is an arm head which is fitted with a niseration and fixed by tightening a nut, and a bracket part is attached to the free end of the arm head. 2 are integrally molded. 3 shows a retainer which is connected to the bracket part 2 so as to be rotatable in the vertical direction with a pin 4, and an arm piece 6 for holding a wiper blade (not shown) is fixed to this retainer 3 by caulking with a pin 7. . 8 is the arm head 1 and retainer 3 side,
For example, the spring 8 is a spring that is stretched across the bracket part 6a at the end of the arm piece 6, urges the tip end of the retainer 3 downward, and suppresses the wiper blade against the windshield surface (not shown). The other end is the lower blade of the connecting pin 4 of the bracket part 2 of the arm head 1' and is anchored to a hook member 10 which is attached to a pin 9 which is arranged at a position offset to the wiper pivot w and p side. In the case of a wiper device, in order to easily replace the wiper blades or to prevent the wiper blades from being buried due to snowfall, the unit on the tip side of the retainer 3 is lifted directly from the windshield and stood up. It is required that it can be maintained.

For this reason, if the hook member 10 described above is straight as shown by the chain line 10a in FIG. I become unable to move.

Therefore, normally the hook member 10 is
The hook member 10 is bent into a dogleg shape or an arc shape to prevent the hook member 10 from interfering with the bracket portion 2 when the retainer 3 is rotated upward. This similar structure is shown, for example, on page 127 of the Sankaido Edition Automotive Engineering Complete Review 10 Electrical Components, Vehicle Body Equipment, and Engine Parts published on October 15, 1980.

Problems to be Solved by the Invention When the hook member IO is bent and formed, the vertical dimension of the wiper device becomes very large, which obstructs #'y5 visibility, and it is difficult to install the wiper device, especially when using a concealed wiper specification. The layout around the parts becomes extremely difficult. In addition, FIG. 6'P5 shows the book.

Therefore, as shown in Japanese Utility Model Application Publication No. 58-122645, a slit is formed in the center of the tip of the bracket part of the arm head to prevent the aforementioned hook member or spring from turning when the retainer rotates upward. It has been proposed that the side end portions pass through this slit to prevent handling. However, if a slit is formed in the bracket part of the arm head in this way, the connecting part between the bracket part and the retainer will be divided into left and right parts, which will reduce the strength of the connecting part. The torsional load generated on the windshield caused rattling, and the wiper blade shuddered, making it impossible to properly wipe the windshield surface.The wiper blade also rested on the pillars of the windshield, damaging the blade rubber. This may lead to problems such as being damaged. In addition to this more functional problem, since the connecting part is divided into left and right parts, it is necessary to improve the centering accuracy of this left and right connecting part, which makes processing management extremely troublesome.) It can also be a factor that inhibits sexuality.

SUMMARY OF THE INVENTION Therefore, the present invention provides a wiper device for an automobile that can hold a retainer upright without increasing the height dimension of the device or reducing the strength of the connecting portion between the arm head and the retainer.

To solve this problem, a guide roller is protruded through a bracket from the front side of the free end of the arm head to which a flat retainer is connected with a pin. A sword that has a spring that biases it downward.
A cam member is attached to the retainer, which is normally separated from the guide roller, and when the retainer rotates upward, elastically contacts and engages with the guide roller against the spring force to hold the retainer upright. It's a distribution.

EXAMPLES Hereinafter, practical examples of the present invention will be described in detail with reference to the drawings, with the same reference numerals given to the same parts as in the conventional structure.

In FIGS. 1 to 3, the free end of the arm head 1 to which the retainer 3 is vertically rotatably connected with the pin 4, that is, the upper surface of the bracket part 2, has a groove in which the rear end of the upper surface of the retainer 3 engages. This is to form a stopper portion 11 that uses a moving mechanism. A pair of guide rows, PI3, are disposed protruding from the front side of the bracket part 2 via a platen 12.The bracket 12 is formed in a planar portal shape that straddles both sides of the bracket part 2, and both side arm parts 12 The rear end of a is formed below the connecting point of the pin 4 of the bracket part 2 and at a position offset toward the wiper pivot (see Fig. 6), and is connected through the slotted hole 14. . The arm portions 1 of the bracket 12 are attached to the lower edges of both sides of the bracket portion 2.
2a Rail part 16t on which the lower edge is placed - stepped molding, and a platen on the front upper part)L2 roller holder 1
2b is formed with a guide edge 17 that engages with the upper surface so that the bracket 12 can move forward and backward within the range of the elongated hole 14 without rotation. Further, a recess 18 is formed in the center of the lower surface of the bracket part 2 over an appropriate range from the front edge thereof to the part where the elongated hole 14 is formed.
The hook member to A, which serves as the bottle 15 inside, and the hook 8a at the other end of the spring 8 are connected to connect the retainer 3 to the first
It is biased counterclockwise in the figure. - A cam member 19 is fixedly mounted on the back surface of the earthen wall at the rear end of the retainer 3 in correspondence with the guide roller 13. The cam member 19 is formed in the shape of a front gate, and has cam ends corresponding to the guide rollers 13 on both rear edges thereof. This cam part is separated from the guide roller 13 in the normal state, and comes into elastic contact with the guide roller 13 as the space 3 rotates upward.

The slope portion 20a is formed to be able to engage with the slope portion 20a;
The retainer 3 is composed of a locking protrusion 2ob that continues to the slope portion 20a and an arc-shaped recess 20c that receives the guide roller 13, and when the retainer 3 is rotated upward, the rear end of the upper surface engages with the stopper portion 11. Guide roller 1 is exactly at the stopped position.
3 falls into the recess 20c and is struck by the spring 8 sword,
It is designed to engage.

According to the structure of the above embodiment, when the retainer 3 is rotated upward, the slope portion 20a of the cam portion m comes into contact with the guide rod 13, and when the retainer 3 is further rotated upward, the engagement occurs as shown in Fig. Wc4. The stop protrusion 20b rides on the guide roller 13, and the row 213 is pushed against the force of the spring 8 to lock the bracket) 1
When the retainer 3, which is moved backward together with the retainer 2, is rotated to a position where the rear end of the upper surface of the retainer 3 locks with the stopper part 11, the locking protrusion 2ob is released.

The guide roller 13 passes through the troller 13 and falls into the recess 20C as shown in FIG. 5, and is strongly elastically contacted and engaged by the force of the spring 8 to hold the retainer 3 upright.

Effects of the Invention As described above, according to the present invention, the guide roller and the cam member are connected at the front position of the free end of the arm head by effectively utilizing the spring force that biases the tip end of the retainer toward the windshield [1ilr@]. In order to hold the retainer upright by strongly engaging the spring, the height dimension around the connection between the arm head and the retainer must be adjusted in consideration of the interference between the spring and its holding member and the free end of the arm head. increase or
This has a great practical effect in that it is possible to simultaneously satisfy the conflicting problems of the conventional devices without compromising the strength of the connecting portion by dividing it into two parts.

[Brief explanation of drawings]

FIG. 1 is a side view showing essential parts of an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow I in FIG. 1, FIG. 3 is a sectional view taken along line I-i in FIG. 5 are side views showing the rotating state of the retainer, and FIG. 6 is a sectional view showing the conventional structure. l... Arm head, 2... Free end (bracket part), 3... Retainer, 12... Bracket, 1
3...Guide roller, 19...Cam member. 2 people Figure 1 Figure 4

Claims (1)

[Claims] (1) A retainer is rotatably connected to the free end of the arm head, and a guide roller is protruded from the front side of the free end of the arm head via a bracket so as to be movable forward and backward, and the bracket and retainer are connected to each other. A spring is provided across the retainer to bias the distal end of the retainer downward, while the retainer is normally separated from the guide roller and is guided against the spring force by upward rotation of the retainer. A wiper device for an automobile, comprising a cam member that elastically contacts and engages a roller to hold a retainer upright.